Pump-controlling means.



No. 788,488. PATBNTBD A8828, 1904.

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PUMP CONTROLLING MEANS;

l APPLICATION FILED FBB.'29. 1904..

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UNITED STATES Patented August 23, 1904. i

PATENT OFFICE.

.PUMP-CQNTROLLING MEANS.

SPECIFICATION forming part of Letters Patent No. 7es,4ss,`datea August 23, 1904. Application filed February' 29, i904. serial NQ. 195,776, (No model.)

T all whom, it Hetty concern:

Be it known that I, WILLIAM SMALL, residing at Sourlake, in the county of Hardin and State l of Texas, have invented a new and Improved Pump-Controlling Means, of which the following is a specification.

My invention is in the nature of an improved means operable by the variable pressure of the fluid being pumped for controlling or gov-v erning the pump operation, whereby to maintain a uniform and veven pressure on the discharge-line; and the said invention primarily.

seeks to provide afmeans for the purposes stated of a simple, economical, and compact construction which will eifectively operate as a governor for the pump in such manner that when pumping oil large quantities of the amount that is usually wasted whenever a break in the oil-line occurs by reason of ex-` cessive pressure or when the supply to the suction becomes too low is saved, whereby pumps when equipped with my improvement hereinafter explained will require less attention, and the service of one or more attendants at the station usually required Kis dispensed with.

Ass

My invention comprehends the peculiar cooperative arrangement of parts hereinafter described, specically pointed out in the claims which are connected by a T-pipe 4, to which the discharge-pipe 5 Joins, as shown.

The cylinder 2 is arranged to cooperate with the throttle-rod 6, which in practice actuates the vusual type 'of throttle-valve, (not showin) the opening or closing of which is regulated according. to the pressure in thedischargeline. The throttle-valve rod 6 is normally held shifted in a position for holding the'valve open by the normal pressure on the dischargeline, and it is shifted to its .valve-closing position-that is, in the direction indicated by the arrow ct-whenever the fluid-pressure de-A `member 8, one end of which is pivoted at l0 in the slotted standard 9, and the other end terminates in the handle extension 10b, that is movably guided in the slot 9c of the standard 9, as shown. y f

1l designates a plunger orpistonvalve located in the cylinder 2, the stem or rod 11a of which extends up through the head of the cylinder 2 and is fixedly joined to the lever 10 and its upper end extended up through the crosspiece 8 and through an externally-threaded sleeve l2, which engages a threaded socket l2 in the piece 8, and is provided for adjusting the tension of the springl, which encircles the upper'end of the stern 11a, which is disposed between the said piece 8 and the leverlO, as-shown.

So far as described whenever the pressure in the discharge-line is up to the normal the piston in the cylinder 2 is forced upward, and thereby moves the lever l0 upwardly against the tension of the spring' 14 and holds the throttle-valve open to its normal position; but should a break occur in the discharge-line or if the suction-line, presently 'referred to, gets -air through any cause the said lever 10 will be forced downward, and in consequence the throttle-stem is automatically adjusted to close or shift the 'throttle-valveto close off the steam-supply, and thereby stop the pump. The cylinder 3, that connects with the T-joint, also joins with the cylinder 2 and communicates with the suction-line 3a or with a drainpipe, as may be desired. r A

The spring that actuates to shift the lever 10to its pump-cutting-oif position in practice is set under such tension or. stress that when the desired pressure on the dischargeline is reached the piston rises above the overflow and allows the surplus of4 the liquid pumped to flow into the suction of the drain- IOO * and helps to raise the regulating valve or piston 30, presently again referred to. The rod 60 connects With a second lever 20, pivotally mounted at one end in the slotted standard 9b, that projects from the base or cap '1, and the handleend 2Ou of the lever 20 moves in the slot of an oppositely-disposed standard 9d.

The connections With,the joint or rod 6()a and the lever 2O is such that when the said rod (SOIL is lifted the lever 2O is raised, and by reason thereof it lifts the piston 30 Within the cylinder 3, which is iXedly connected to the lever 20, which operation adjusts the said piston 30 to regulate theiiow of the supply or overpressure oil or other liquid being pumped, and to cause it to flow into the suction.

By reason of the cooperative arrangement of the cylinder 13 the pistons 60 and 30, lever 20, and the connections that join the said lever 2O With the pistons 6() and 30 the pressure on the pump is not eected by any variation of the steam-pressure near the normal. The lever 20 is also automatically held pushed or in its down or normal position'bya spring 20, which surrounds the shank or rod 8OlL of the piston 30, as shown.

lt will be understood that in case the steampressure drops to an abnormal point the pump would stop entirely; but in that ease the said pump can be readily started again by the pumpman raising the throttle -lever 10 by hand.

rlhe handle portion of the levers 2O and 10 is extended so that Weights can be used to assist the springs in their operation, if it should be found necessary.

While I have shown it, it is obvious that a by-pass might be used in conjunction With my improved governor devices, so that the pump may be started without interfering with the levers or disarranging them after they have been once properly adjusted.

From the foregoing description, taken in connection with the accompanying drawings, it is thought the advantages and complete operation of my invention will be readily understood by those skilled in the art to which it appertains.

My improvements when applied to a pump will save large quantities of oil that are now usually wasted Whenever a break occurs and that will save pumps from an injury by shutting them down when otherwise they would run o Whenever a break occurs or when the supply of suction becomes too low.

Having thus described my invention, what I claim, and desire to secure by Letters latent, is-

1. A means for controlling the throttlevalve of pumping-engines, which comprises in combination with the valve-roc; a suitable framing, a lever pivotally connected thereto to which the throttle-valve connects a spring for forcing theflever and the rod in onedirection, an intake-cylinder, a second cylinder, a T-joint connecting the two cylinders, said T- joint having a discharge, a piston operable in the second cylinder, said discharge being controlled by the varying fluid-pressure within the cylinder 2, said piston having its rod connected to the valve-shifting lever, all heilig arranged substantially as shown.

2. A means for controlling the throttlevalve of pumping-engines, which comprises in combination with the valve-rod; a suitable framing, a lever pivotally connected thereto, to which the throttle-valve connects a spring for forcing the lever and the rod in one direction, an intake-cylinder, a second cylinder, a T-joint connectingvthe two cylinders, said T- joint having a discharge, a piston operable in the second cylinder, said discharge being' controlled by the varying fluid-pressure within the cylinder 2, said piston having its rod connected to the valve-shifting lever, and a means controlled by steam-pressure from the pump for regulating the inflow to the intake-cylinder.

TILLIAM SM AL L. lVitnesses:

JAs. HoLLnRN, JOHN liNUnsnN.

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